时间:2019-02-23 作者:英语课 分类:英语时差8,16


英语课

A lot of people love that fresh-dirt smell. The surprising thing, though, is that it isn’t coming from the dirt itself. Microbiologists have traced the pleasant odor to an organic chemical called “geosmin.” A microbial geneticist named Keith Chater at the John Innes Center in England has traced geosmin down to a common bacterium 2 called Streptomyces coelicolor. He even found out exactly which gene 1 in the little critters causes them to produce geosmin. Interestingly enough, there are unconfirmed reports that animals are attracted to fresh dirt in the desert, and go there looking for water. As they nose around the dirt, they pick up plenty of S. coelicolor, which then hitch 3 a ride from one oasis 4 to the next. If it’s true, then the bacteria in general may create the odor in order to attract animals. The animals find water, the bacteria are spread, and everyone is happy.



n.遗传因子,基因
  • A single gene may have many effects.单一基因可能具有很多种效应。
  • The targeting of gene therapy has been paid close attention.其中基因治疗的靶向性是值得密切关注的问题之一。
n.(pl.)bacteria 细菌
  • The bacterium possibly goes in the human body by the mouth.细菌可能通过口进入人体。
  • A bacterium is identified as the cause for his duodenal ulcer.一种细菌被断定为造成他十二指肠溃疡的根源。
v.免费搭(车旅行);系住;急提;n.故障;急拉
  • They had an eighty-mile journey and decided to hitch hike.他们要走80英里的路程,最后决定搭便车。
  • All the candidates are able to answer the questions without any hitch.所有报考者都能对答如流。
n.(沙漠中的)绿洲,宜人的地方
  • They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。
  • The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。
学英语单词
acid-proof phenolics
aesthetic fatigue
airbases
appellant mode
ar-rahim
Asarco Mexicana
black tights
browser-based
Buyukyenice
carvellis
Castaňo, Sa.del
catoptric power
Cauro
ceramodontia
chill store
cinnamylic acid
comaster distinctus
cortical synthesis
Costaria
critical shears
cronica
cyberindustries
Dareton
delexicalization
detector window
difficulty in breathing
dragon project
dry elutriator
dynamic libration
electric concentration
electronic hygrometer
epidemic neuromyasthenia
eye-screens
fishback
floating material
graphic methods
hay-jack
hesternal
hip replacement
hungry soil
karaman
khowr
lactyl lactate
lndsc key
lobby ventilation
longitude clock
loss limit lighwave communications system
low power range system
luchini
lucrezia borgias
marsh felwort
metallic arc welding
microcrazing
Moplahs
more salient
multi-colours
Musorgsky
neodymium laser
network configuration
nickel-based
nine-thirty
not even one
odocoileus hemionus columbianuss
once-luxurious
oncootic
optimized model of power source
out-wealth
over and-under relay
overarch
package card
product distribution
pseudocepal thickening
rattle over
research target and test vehicle
rudps
scorchy
shook her fist at
simulant
sketch ball
slag-heap
smooth mapping
space hematology
square tool post
standard fruit-tree
steffen
sukhdev
symbolic links
sympitars
the biggest frog in the pond
thoracic vertebrae
to careen
total laryngectomy
traction phenomena
tricentenial
tropical diarrhea
two batches
Tédji
undecene
unnoticed
viral pneumonias
who can say
zone structure